What's Your Reason for Not Using the Stock Kernel... - ONE General

I see a lot of people are quick to flash AK, Franco, Tyr, etc before they even give the kernel that comes with the ROM a try.
From my personal experience, the kernel that comes with a ROM is always faster & snappier than aftermarket kernels (no overclocking).
Also, correct me if I'm wrong, but the kernel that comes with the ROM is optimized to perform best with the ROM. Optimization is the main reason why Android is one step behind of iPhones. I don't know about you guys, but I want my phone to be fully optimized which is why I stick with the stock kernel most of the time.

I guess I'm also one of these people who are quick to flash a aftermarket kernel.
But I think the aftermarket ones are the more optimized ones.
Anyway I never had problems with the stock kernels.

I love the extra work devs like Franco and AK do. Sometimes I get some reboots with Franco but overall its a good experience. I just have some Franco loyalty from when I used his kernel on nexus 4 lol best kernel ive ever used. Not sure if I'd say the same about his one plus kernel but if there's any issues I'd blame cm not him

Klobal said:
I guess I'm also one of these people who are quick to flash a aftermarket kernel.
But I think the aftermarket ones are the more optimized ones.
Anyway I never had problems with the stock kernels.
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I used to be the same way on my older android devices.
It seems like now flashing a kernel is no longer need to improve performance (sorta)
The hardware on the oneplus one is beast & android has come a long way in terms of software.

Because I love the sound control in AK Kernel

jousa11 said:
Because I love the sound control in AK Kernel
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Better than Viper or DSP?

OmegaBlaze said:
Better than Viper or DSP?
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I use viper as the audio processor AK's kernel just gives good audio gain without any distortion

OmegaBlaze said:
I used to be the same way on my older android devices.
It seems like now flashing a kernel is no longer need to improve performance (sorta)
The hardware on the oneplus one is beast & android has come a long way in terms of software.
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I believe the same. I get most battery savings from deleting bloat off the phone.

NJGSII said:
I believe the same. I get most battery savings from deleting bloat off the phone.
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I do the exact same thing. I try and delete all of the unnecessary google play stuff as well as apps I don't use often. And use greenify as well.

jousa11 said:
I use viper as the audio processor AK's kernel just gives good audio gain without any distortion
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Click to collapse
I definitely have to try that out. I usually always skip pass it lol..

I use franco kernel because I get better battery with his kernel (compared to stock), and it's always up-to-date with most of the patches, while with stock you'll have to wait until the next OTA to get some patches.

NJGSII said:
I believe the same. I get most battery savings from deleting bloat off the phone.
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Click to collapse
Can you please name bloat stuff which still comes with Cyanogenmod what should be deleted? Would be helpful for me to get my phone as clean as possible/neccessary.

m4soN said:
Can you please name bloat stuff which still comes with Cyanogenmod what should be deleted? Would be helpful for me to get my phone as clean as possible/neccessary.
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Meant that with other phones I have

So, there is no stuff which still comes with systems like cyanogenmod which i can delete without getting any trouble? If yes, how do i know which stuff this can be?

Purchased Franco Kernel Updater and if I didn't use a custom kernel (or Franco Kernel) then I spent money on something I'm no longer using.
Also because I'm not a fan of mpdecision.

zephiK said:
Purchased Franco Kernel Updater and if I didn't use a custom kernel (or Franco Kernel) then I spent money on something I'm no longer using.
Also because I'm not a fan of mpdecision.
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Click to collapse
Same here switching between AK and Franco.
Both are a good choice.
But as mentioned before, the hardware of our phone is :good: so no need to flash a aftermarket kernel to gain more performance.

zephiK said:
Purchased Franco Kernel Updater and if I didn't use a custom kernel (or Franco Kernel) then I spent money on something I'm no longer using.
Also because I'm not a fan of mpdecision.
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Why not? Intelliplug?

OmegaBlaze said:
Why not? Intelliplug?
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Anything other than mpdecision, I personally prefer Franco's hotplug algorithm which is his own implementation of powering on/off cores.
Mpdecision is Qualcomm's implementation of powering on/off cores.
I personally am not a fan of Intelliplug,
3 - Don't even bring intelliplug on this. With all due respect to faux, that driver is a butchered solution to control the cores. The code is a mess and, in my opinion, just doesn't make any sense. I've worked on my Hotplug driver for years and it works as simple as need be, with appropriate userspace tunables for users to tinker with.
http://forum.xda-developers.com/showpost.php?p=55667033&postcount=3981
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http://www.reddit.com/r/nexus4/related/158t1i/custom_kernels_a_guide_on_what_you_need_to_know/ has a great reading on mpdecision and why it is not good in their opinion.
--mpdecision--
All Qualcomm based phones have Qualcomm prorprietary userspace binary called "mpdecision" aka m(ake)p(oor)decision. Instead of letting the kernel itself to decide what frequencies and how many cores to run, this "mpdecsion" binary polls the kernel run queue statistics and decides for the whole system the "optimal" frequency and the "optimal" number of cores to use. The concept is fine, except the decision making is done in userspace and it's 100% closed source so there's no way to tweak it and there's a latency (because all userspace binaries needs to "poll" the kernel for the latest information which is slightly delayed). - faux123
ELI5: mpdecision is a proprietary Qualcomm daemon that makes calls to the SoC (the entire chip your phone uses) to manage the cores. The OS (PowerHAL) makes a request to mpdecision and then mpdecision makes a request to the first two cores to ramp them up. - _motley
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I like to mess with my phone. Simply because I need a kernel fully optimised kernel for the device. Not to say that the developers aren't doing a good job, but in my case, a user sometimes knows better than the creator themselves.
Unless the custom kernels do not satisfy me, I'll revert back to stock.

m4soN said:
So, there is no stuff which still comes with systems like cyanogenmod which i can delete without getting any trouble? If yes, how do i know which stuff this can be?
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Click to collapse
This phone is fairly clean out of the box. About the only stuff worth freezing or deleting would be some of the google play apps if you don't use them. For example Google play books, news stand, or games.

Related

CM7 Kernel Recommendations?

Hello all!
Just upgraded my wife from the MyTouch 3G Slide to the G2 as she has to have a keyboard and we were on our 5th replacement Slide. So, as she is not the geek that I am, she will not be constantly flashing new ROMs and such. However, I am going to at least install the latest CM and I am looking for kernel suggestions. I already have root, s-off, new hboot, and all that, I'm just waiting for CM7 to finish downloading.
I started using Android with the G1 and constantly updating Radios, as well as ROMs and I currently use a Samsung Vibrant running a TeamWhiskey ROM. It's stable as anything, I like the theme, and CM7 still has some broken stuff on the Vibrant. I'm glad to see that Eugene recently picked up a G2 as he made some bad ass kernels and ROMs for the Vibrant.
So, let's here those kernel recommendations and why you recommend them.
Thanks!
Well am currently using mexdroidmod and their kernel is pretty awesome because its fast and stable. My best advice is to test the diffrent kernel and read through the tread, see what people say about it. All the kernels I have tried are all awesome so you should try them
Sent from my HTC Vision using XDA Premium App
pershoot's kernel. great batt life and OCing
Umaro's kernel has been rock solid for me and has tons of features as well. You can OC all the way to 1.9 Ghz if you so please and it has smartass.
well considering your wife isn't much of a techie.. i say you should go with pershoots kernel because he's always releasing updates and i've never had a problem with any of them. the battery life is excellent if you use the right radio (.17 and .30 have been good to me), but you need to experiment with this though. the phone runs beautifully, just make sure you use superwipe+ to format/wipe so you don't end up with gps issues like many people have had, good luck!
I've run umaro, eugene, pershoot, flippy, pyro, etc etc... aaand I've decided that the provided kernel is pretty much good to go. yeah, there are some little trinkety things with a few of the above kernels that the standard CM7 kernel doesn't support... but honestly, they're worthless to a user who just wants to turn the phone on and have it work.
set her up with the stock kernel @ 245-1017 (I haven't found a reason yet to ditch the ondemand governor, it seems to work best with CM7) and a vanilla gingerbread launcher and she'll be blown away.. that's my $.02
Like said above, CM kernel is great. I've tried most or even all available kernels for CM and finaly decided to stick with original one. It's stable and supports OC (up to 1.5GHz) "out of box", so really, I see no single reason to use the other ones.
Sent from my HTC Vision using XDA App
AllWin said:
Like said above, CM kernel is great. I've tried most or even all available kernels for CM and finaly decided to stick with original one. It's stable and supports OC (up to 1.5GHz) "out of box", so really, I see no single reason to use the other ones.
Sent from my HTC Vision using XDA App
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I'm also thinking about changing the kernal, but only for smartass. Does smartass offer that much of an increase on battery life or anything else? Also, when you OC, do you use SetCPU or just CyanogenMod Settings?
slapshot30 said:
I'm also thinking about changing the kernal, but only for smartass. Does smartass offer that much of an increase on battery life or anything else? Also, when you OC, do you use SetCPU or just CyanogenMod Settings?
Click to expand...
Click to collapse
not at all pooping on any of the guys who swear by smartass/other governors, but the change in battery life is almost unnoticable for me.. the change in performance however can be pretty apparent.
here's my problem with "battery saving" governors:
in order to save battery, these governors are supposed to be more intelligent about which frequencies they select once a task is called... well, that's all well and dandy, but the problem is that the majority of battery-hogging apps (ie streaming music/video, gaming, browsing for a long time, being on the phone, etc) are still going to be battery hogs with or without a fancy governor. the governor isn't capable of making an app that needs a lot of processing power run well at a lower frequency, it can only try to be more selective about which frequencies it uses in order to attempt to save battery life.
additionally, most people use their phones like this: phone is idle (ie screen off), and a call arrives. call ends, phone is back to idle. texting a few people, back to idle. playing a game for 15 minutes, back to idle.
is it really logical to assume that these short bursts of activity are going to benefit at all from a fancy shmancy governor? I doubt it.
I still swear by ondemand or interactive (both work well for me) thru built-in settings if possible (ie cyanogen performance settings). second choice would be setcpu with no profiles (unless you're overclocking heavily, then you should at least have a temp warning profile). at this point, screen-off profiles don't do a damn bit of good, because pretty much every kernel we have for the vision is going to scale down during inactivity.

[Q] Kernels for Lollipop?

Are there currently any kernels that would work nicely with 5.0? I want to overclock a bit but don't think theres any kernels yet, just asking here as assurance I'm right or to be proved wrong.
S1L3nTShaDoWz said:
Are there currently any kernels that would work nicely with 5.0? I want to overclock a bit but don't think theres any kernels yet, just asking here as assurance I'm right or to be proved wrong.
Click to expand...
Click to collapse
Youre able to use any kernels such as funky, faux, etc. Basically any that dont come with their own ramdisk. Personally i use snuzzos funky kernel that if you care about benchmarks puts the grouper right on top with this years' flagship devices on antutu without any overclocking. Though if thats a need faux is stable enough with lolipop to overclock nicely
Edit: if you were to go with funky you should try out the CPU governor 'lulzactive' as that's by far better than any other I've tried, on my hardware at least.
abrahammmmmmm_ said:
Youre able to use any kernels such as funky, faux, etc. Basically any that dont come with their own ramdisk. Personally i use snuzzos funky kernel that if you care about benchmarks puts the grouper right on top with this years' flagship devices on antutu without any overclocking. Though if thats a need faux is stable enough with lolipop to overclock nicely
Edit: if you were to go with funky you should try out the CPU governor 'lulzactive' as that's by far better than any other I've tried, on my hardware at least.
Click to expand...
Click to collapse
Will do, I'm looking for something to make my N7 go from a car engine to a hyperdrive! & yes I love getting high benchmarks, sorta tricks me into believing my device is faster than it is lol. Might make me be totally oblivious to any lag haha xD. Anyways I'll give funky a shot with the lulzactive gov as I've already tried Faux before.

how to increase battery life by 25%

It is simple, tested on my nexus 6, just go to system/bin and delete mpdecision, then install an app that controls kernel, like kernel adiutor, raise min freq of cpu to 883000 mhz, then set apply on boot, reboot phone and enjoy lagfree and smooth super battery life
you are my hero
fedef12evo said:
It is simple, tested on my nexus 6, just go to system/bin and delete mpdecision, then install an app that controls kernel, like kernel adiutor, raise min freq of cpu to 883000 mhz, then set apply on boot, reboot phone and enjoy lagfree and smooth super battery life
Click to expand...
Click to collapse
Isn't enough to just turn off mpdecision in the kernel app?
this only works for stock roms? I can't find any mpdecision file on /system/bin
Sent from my Nexus 6 using Tapatalk
blanco2701 said:
Isn't enough to just turn off mpdecision in the kernel app?
Click to expand...
Click to collapse
if it turn off the 3 sec boost of mpdecision yes
sgloki77 said:
this only works for stock roms? I can't find any mpdecision file on /system/bin
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
works on all roms for nexus 6, some file managers cant see mpdecision in system/bin, try it in recovery using twrp
fedef12evo said:
raise min freq of cpu to 883000 mhz
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Click to collapse
Can you tell me if it's the minimum CPU frequency in the CPU tab or in the CPU governor configuration?
blanco2701 said:
Isn't enough to just turn off mpdecision in the kernel app?
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Click to collapse
Disabling in a kernel app will accomplish the same thing. The reason you are seeing a change in battery life is because of the 3 second input boost of MPD. Most of the custom kernels have a generic touch boost driver that is set to 1 second or less to take the place of the mpd boost and increase battery because of the decreased boost time.
MPD works great for some people and not for others. It is greatly dependent on your usage habits. For my typical usage, with mpd on, I average 6-7 hours of screen on time. If you are a gamer, where you are constantly touching the screen, mpd will adversely affect your battery life because of the constant boost.
As a kernel developer, I definitely would not recommend deleting the mpd binary. I would suggest trying a couple of different kernels and/or configurations to accomplish the same results.
lol.. seriously? i guess thats one reason that ive disabled mpdecision for the last 3+ years on whichever nexus i was on, but not the main reason
How can I turn mpd off on ex kernel manager
you don't need a kernel app to disable it BTW. all kernel apps do is provide a ui for you to use. it can be done via a terminal emulator app.. type,
su(press enter)
stop mpdecision(press enter)
and that's it.
I'm using kernel auditor and in the CPU hotplug section the first listing is mp decision. Is that what needs to be disabled?
OK, silly question.. do you know what mpdecision does? do you know what disabling mpdecision does?
simms22 said:
OK, silly question.. do you know what mpdecision does? do you know what disabling mpdecision does?
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@simms22 good point here. This is good for everyone to know. If you disable mpd without a replacement, you risk all cores not coming back online after deep sleep. Mpd doesn't actually control hotplugging, it controls input boost and onlining of cores.
Sent from my Nexus 6 using Tapatalk
and that's exactly why I disable mpdecision, so I can have all 4 cores active at all times.
buckmarble said:
@simms22 good point here. This is good for everyone to know. If you disable mpd without a replacement, you risk all cores not coming back online after deep sleep. Mpd doesn't actually control hotplugging, it controls input boost and onlining of cores.
Sent from my Nexus 6 using Tapatalk
Click to expand...
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When you say without a replacement what are you referring to? Trying to learn here..
MrMiami81 said:
When you say without a replacement what are you referring to? Trying to learn here..
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A replacement such as Zen, Mako, Blu_Plug, etc.
Also, (just an FIY) Zen isn't really a hotplug (it keeps all four cores active at all times, unlike Mako, Blu_Plug, etc). It's still lumped in there for some reason.
I highly recommend disabling MPDecision. You know what MPDecision stands for, right? MakePoor Decisions
Face_Plant said:
A replacement such as Zen, Mako, Blu_Plug, etc.
Also, (just an FIY) Zen isn't really a hotplug (it keeps all four cores active at all times, unlike Mako, Blu_Plug, etc). It's still lumped in there for some reason.
I highly recommend disabling MPDecision. You know what MPDecision stands for, right? MakePoor Decisions
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Click to collapse
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?
MrMiami81 said:
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?
Click to expand...
Click to collapse
i believe its already disabled in elementalx kernel. anyways, you can always use a terminal emulator app, then type..
su(press enter)
stop mpdecision(press enter)
thats all. all kernel apps do is give you a ui to whats already available.
MrMiami81 said:
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?
Click to expand...
Click to collapse
Some kernels come with it already removed. Check the features section of the original post in the Elemental X thread or try searching the thread.
I can say from experience that Kernel Auditor doesn't give you access to all of the adjustments in Elemental X. Some features are only accessible through the official Elemental X app, so it might be there, but you can't use Kernel Auditor to adjust it.
Face_Plant said:
Some kernels come with it already removed. Check the features section of the original post in the Elemental X thread or try searching the thread.
I can say from experience that Kernel Auditor doesn't give you access to all of the adjustments in Elemental X. Some features are only accessible through the official Elemental X app, so it might be there, but you can't use Kernel Auditor to adjust it.
Click to expand...
Click to collapse
I just downloaded the elemental x app. I'm gonna go over to the thread now. I appreciate your help

Heat issues on custom roms

So, I noticed that the phone heats up significantly more while using a custom ROM. All I've tried do it (purenexus, exodus, cm). Right now I'm running trupurexmm and it's fine, presumably because it's modified stock. Does anyone know why this happens, or can recommend a good 6.0.1 ROM that doesn't?
Thanks!
Sorry I can't make a recommendation, but I assume the reason the modified stock and stock ROMs run cooler is CM and various others most likely lack the stock thermal-engine config which controls CPU throttling and hot-plugging.
quakeaz said:
Sorry I can't make a recommendation, but I assume the reason the modified stock and stock ROMs run cooler is CM and various others most likely lack the stock thermal-engine config which controls CPU throttling and hot-plugging.
Click to expand...
Click to collapse
Is there a fix for this that you know of?
I'm running CM right now and have used two other custom ROMs. All of them run hot at first, there's a lot going on after flashing a ROM and it's CPU extensive so they will get hot. After the dalvik gets rebuilt and everything settles down the temps return to normal. All the kernels have thermal throttling of some sort otherwise the phones would self destruct.
My limited experience with CM on a couple of phones is that the CPU governor doesn't work. There have been numerous fixes recently that help but it still doesn't work as well as stock overall. Stock was a bit jerky, so there are a few cases where the CM governor might feel better.
Brookspeffer said:
Is there a fix for this that you know of?
Click to expand...
Click to collapse
Not that I know of.. maybe a custom kernel? Not sure if CM's kernel is configurable as far as changing CPU hot-plugging and throttling thresholds.
Brookspeffer said:
Is there a fix for this that you know of?
Click to expand...
Click to collapse
Lower screen resolution to 1080p

[REQUEST] Stock Kernel with KCAL?

Hi, this is a friendly request for the senior devs on this forum. I am actually a noob when it comes to kernel compilation. So I wanted to ask if anyone here has already compiled or is willing to compile the latest stock kernel (from 3.6.1) with no other features except kcal controls. Because me and other OP2 users feel that battery life is best on stock kernel but the washed out display is absolutely disgusting. Also if it's not possible just us know, thanks in advance!
ThaRealSaad said:
Hi, this is a friendly request for the senior devs on this forum. I am actually a noob when it comes to kernel compilation. So I wanted to ask if anyone here has already compiled or is willing to compile the latest stock kernel (from 3.6.1) with no other features except kcal controls. Because me and other OP2 users feel that battery life is best on stock kernel but the washed out display is absolutely disgusting. Also if it's not possible just us know, thanks in advance!
Click to expand...
Click to collapse
Did you try boeffla's kernel? gives much better battery life than stock for me (1/3 longer, in any scenario i tested it).
If you still want to have stock kernel here are the kcal commits. just set up Virtualbox Ubuntu, set up build environment , download official op kernel source (the 6.0.0 version!) and cherry-pick the commits (google it).
If the effort is not worth it, use boeffla's or stock without Kcal.
I can try to help you if you're stuck, but mind that i'm just starting with compiling stuff myself.
wertus33333 said:
Did you try boeffla's kernel? gives much better battery life than stock for me (1/3 longer, in any scenario i tested it).
If you still want to have stock kernel here are the kcal commits. just set up Virtualbox Ubuntu, set up build environment , download official op kernel source (the 6.0.0 version!) and cherry-pick the commits (google it).
If the effort is not worth it, use boeffla's or stock without Kcal.
I can try to help you if you're stuck, but mind that i'm just starting with compiling stuff myself.
Click to expand...
Click to collapse
Yeah man I have tried boeffla. Performance is okay but battery isn't as good as stock imho. Maybe my settings affected it. Can you tell me which version of boeffla you use and what settings so maybe I can replicate your results. Thanks man.
ThaRealSaad said:
Yeah man I have tried boeffla. Performance is okay but battery isn't as good as stock imho. Maybe my settings affected it. Can you tell me which version of boeffla you use and what settings so maybe I can replicate your results. Thanks man.
Click to expand...
Click to collapse
Sure, i use boeffla 2.4-beta5, interactive battery extreme governor (u can tweak max frequency on little to 1200mhz), set little cores (i use 2, you can set it to 3-4 for more performance) set big cores to min0, max0 (if you need power to play games etc. set to min0 max 1-2) GPU underclocked to 27mhz, boost disabled, governor adreno (or powersave, might gives lags)
Further i installed xposed, greenify, amplify (there is a free version, but u have to compile it by yourself--> easiest with android studio).
And i followed this thread to maximize my battery life.
Tried several rom and kernel combinations, with this setup i get a sot of 5-6h with 48h of not charging or 7-8h in less than 24h. But on Lineage 13 its even better... (trying to compile a custom oxygenos, debloated, without playstore, F2FS capable right now but not able to activate F2FS)
If you're interested in the ext4 image, tell me (its untested though).
wertus33333 said:
Sure, i use boeffla 2.4-beta5, interactive battery extreme governor (u can tweak max frequency on little to 1200mhz), set little cores (i use 2, you can set it to 3-4 for more performance) set big cores to min0, max0 (if you need power to play games etc. set to min0 max 1-2) GPU underclocked to 27mhz, boost disabled, governor adreno (or powersave, might gives lags)
Further i installed xposed, greenify, amplify (there is a free version, but u have to compile it by yourself--> easiest with android studio).
And i followed this thread to maximize my battery life.
Tried several rom and kernel combinations, with this setup i get a sot of 5-6h with 48h of not charging or 7-8h in less than 24h. But on Lineage 13 its even better... (trying to compile a custom oxygenos, debloated, without playstore, F2FS capable right now but not able to activate F2FS)
If you're interested in the ext4 image, tell me (its untested though).
Click to expand...
Click to collapse
Damn dude these settings sound a bit extreme doesn't your phone lag like hell lol. And oh hey that sounds really interesting! Is it based off 3.6.1? And what kernel have you implemented it with. Right now I'm testing HalogenOS (loving it so far) but when I feel like switching again I would love to try your build. Link me!
ThaRealSaad said:
Damn dude these settings sound a bit extreme doesn't your phone lag like hell lol. And oh hey that sounds really interesting! Is it based off 3.6.1? And what kernel have you implemented it with. Right now I'm testing HalogenOS (loving it so far) but when I feel like switching again I would love to try your build. Link me!
Click to expand...
Click to collapse
I don't even have microlags (with other kernels and this settings it lags like hell, idk why boeffla doesn't)
However, app opening speed and switching between apps is a bit slower than usual).
Idk what the official source's base is (i guess 3.5.8) as i could'nt boot it up yet. Kernel is original kernel (with F2FS activated by me), i'll change this when it boots with f2fs.
I'll send you the link when i have time

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